The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 26, 2006
Filed:
Sep. 12, 2003
Yasuyuki Watanabe, Chiba, JP;
Naohito Saito, Sakura, JP;
Hisatomo Yonehara, Sakura, JP;
Yasuyuki Suzuki, Kamagaya, JP;
Yasuyuki Watanabe, Chiba, JP;
Naohito Saito, Sakura, JP;
Hisatomo Yonehara, Sakura, JP;
Yasuyuki Suzuki, Kamagaya, JP;
Dainippon Ink and Chemicals, Inc., Tokyo, JP;
Abstract
A negative-working CTP plate which is superior in resolution and printing resistance of the image area of a press plate is provided, which is obtained by forming a latent image on a heat-sensitive layer in a heat-sensitive lithographic printing plate comprising a substrate having a hydrophilic surface and a heat-sensitive layer made of an alkali-soluble polymer formed on the surface of the substrate, using heat generated upon irradiation with laser light, and developing the heat-sensitive layer using an alkaline developing solution. In the heat-sensitive lithographic printing plate comprising a substrate having a hydrophilic surface, and a heat-sensitive layer made of an alkali-soluble polymer formed on the surface of the substrate, an advancing contact angle (θ) of the surface of the heat-sensitive layer with water at 25° C. is within a range from 70° to 110°, a receding contact angle (θ) of the surface of the heat-sensitive layer with water at 25° C. after heating at 150° C. for 3 minutes is larger than a receding contact angle (θ) of the surface of the heat-sensitive layer with water at 25° C. before heating, and a difference in receding contact angle before and after heating, (θ−θ), is larger than 1° and is smaller than 40°.